Power supply capacitor question - CNCzone.com-The Largest Machinist Community on the net!

Danno · #1 12-08-2008, 12:13 PM

It was recommended that i use a 150v 10000 Mf electrolytic capacitor for my servo motor power supply, but don't have one on hand. I have a few 150v 5000 Mf kicking around, and would like to know if connecting 2 X 5000 in parallel is the same as having 1 X 10000. Thanks, Dan

irving2008 · #2 12-08-2008, 12:28 PM

yes it is

JonLed · #3 12-08-2008, 12:29 PM

yes

Jon

Danno · #4 12-08-2008, 06:34 PM

Great !! Now another question. I have 4 of these 5000 Mf caps. Is more better? What I mean is, should I connect 2 to get 10000 Mf, or put all 4 together for 20000 Mf? Thanks

Al_The_Man · #5 12-08-2008, 06:38 PM

To a point, the increase in capacitance can cause the VA rating of the transformer to be exceeded when maximum current is drawn.
Usually for a drive power supply, a design for 5% ripple is more than adequate.
For the calculation, the maximum current draw and Peak voltage would have to be known.
Al.

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